I can confirm that the media player does work with headsets plugged in the jack and A2DP bluetooth. I also have not had any problems transferring files over bluetooth. Maybe a bad install or something not configured correctly?

What that means is that you are installing this Operating System at your own risk. It is exactly what it says it is. It's a disclaimer meaning that you cannot hold anyone responsible or negligible for what the OS may due to your device.
Good Luck :fing02: